Agreed it's not the best mobo for high fsb+quad, but it's still possible and has been done a few times - Grnfinger did 500x9 with his Q9650 four months ago, but it did take a lot of tweaking.

I'm happy with 445 fsb, 4GHz is plenty

All I need is to get it stable on 1.216v, play with some GTLs and skews